[nos-bbs] JNOS PMBO - correction - should be using QRG, not Dial !

[(Skip) K8RRA]

The world is full of options Maiko...

On Sun, 2006-09-24 at 15:25 -0500, Maiko Langelaar (ve4klm) wrote:

> I should know better then to use dial frequencies.
> 
> My QRG is currently 10.127 Mhz
> 
> >  SCS PTC users - 10.127 LSB
> 
> Obviously not the correct dial frequency.

Let's put forward these three options taken from the manual:
TOnes=0[LOW] default:1200/1400 USB/subtract=>10,125.60
TOnes=1[HIGH]  other:2300/2100 LSB&FSK/add=>10,129.10
TOnes=3[SET] set by user=> you're on your own...

> 
> >  DXP38 users - 10.129.1 LSB
> 
> For DXP38 modems using the default 2125 mark tone,
> the dial frequency is more like 10.129.13 LSB.
> 
> Sorry for the confusion.

The whole topic is confusing.
You chose to calibrate on MARK, yet some others specify centerline
MARK/SPACE frequency.
In SCS Pactor mode MARK/SPACE frequencies may be reversed, in RTTY no
reversal permitted.
In SCS a TR parameter reverses MARK-SPACE
In SCS default Mark is higher than SPACE - in KAM-98 MARK must be
specified less than SPACE.
Some other TNC?  Then some other set of rules (and the list goes on)...

The one constant seems to be: Get close then tweek a little.

In the past year I have not seen a good "tuning the radio" guide using
various TNC models.
If anyone has, I'd love to see it?

> 
> Maiko
> 
> 
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73
de [George (Skip) VerDuin] K8RRA k
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